Oxygen concentrating apparatus



FIG. 1 is a perspective view of an oxygen concentrating apparatus showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in FIGS. 1 to 7 are included for the purpose of illustrating portions of the oxygen concentrating apparatus that form no part of the claimed design. 

The ornamental design for an oxygen concentrating apparatus, as shown and described. 